Image capturing apparatus

Abstract

The present disclosure provides an image capturing apparatus, including: a light source module having a first surface and a second surface opposite to each other; an LCD module having a first surface and a second surface opposite to each other, wherein the second surface of the LCD module faces the first surface of the light source module, and the LCD module includes a scattering layer for scattering an incident light; a light-transmitting cover plate having a first surface and a second surface opposite to each other, wherein the first surface of the light-transmitting cover plate is configured to contact with an object to be captured, and the second surface of the light-transmitting cover plate is configured to face the first surface of the LCD module; and a sensor module configured to collect the incident light reflected by the light-transmitting cover plate.

The invention claimed is: 
     
       1. An image capturing apparatus, comprising:
 a light source module having a first surface and a second surface opposite to each other along a thickness direction; 
 an LCD module having a first surface and a second surface opposite to each other along the thickness direction, wherein the second surface of the LCD module faces the first surface of the light source module, and the LCD module comprises a scattering layer for scattering an incident light; 
 a light-transmitting cover plate having a first surface and a second surface opposite to each other along the thickness direction, wherein the first surface of the light-transmitting cover plate is configured to contact with an object to be captured, and the second surface of the light-transmitting cover plate is configured to face the first surface of the LCD module; and 
 a sensor module configured to collect the incident light reflected by the light-transmitting cover plate, 
 wherein in a plane perpendicular to the thickness direction, the sensor module is disposed outside an area surrounded by an edge of the LCD module, and the image capturing apparatus further includes a deflection component disposed between the LCD module and the light source module for deflecting the incident light reflected by the light-transmitting cover plate to the sensor module. 
 
     
     
       2. The image capturing apparatus according to  claim 1 , wherein the scattering layer is made of polymer network liquid crystal material, and the scattering layer scatters the incident light when a first voltage is applied to the scattering layer. 
     
     
       3. The image capturing apparatus according to  claim 2 , wherein the first voltage is determined depending on a thickness of the scattering layer. 
     
     
       4. The image capturing apparatus according to  claim 1 , wherein the LCD module further comprises an upper polarizer, a color filter, an upper light-transmitting plate, a liquid crystal layer, a lower light-transmitting plate and a lower polarizer disposed sequentially along a first direction, where the first direction is from the first surface to the second surface of the LCD module; and
 the scattering layer is disposed between the lower polarizer and the lower light-transmitting plate. 
 
     
     
       5. The image capturing apparatus according to  claim 1 , wherein the deflection component and the sensor module are located in a same plane perpendicular to the thickness direction. 
     
     
       6. The image capturing apparatus according to  claim 1 , wherein the deflection component is a conical waveguide having a conical tip disposed in a direction away from the sensor module. 
     
     
       7. The image capturing apparatus according to  claim 1 , wherein the light source module comprises:
 a display light source for providing illumination when the sensor module is in a non-working state; and 
 a detection light source for providing illumination when the sensor module is in a working state. 
 
     
     
       8. The image capturing apparatus according to  claim 1 , wherein an air gap is formed between the LCD module and the light source module.